On Fri-10/24/14-2014 09:54, Paul E. McKenney wrote: > On Fri, Oct 24, 2014 at 07:29:43PM +0300, Yanko Kaneti wrote: > > On Fri-10/24/14-2014 08:40, Paul E. McKenney wrote: > > > On Fri, Oct 24, 2014 at 12:08:57PM +0300, Yanko Kaneti wrote: > > > > On Thu-10/23/14-2014 15:04, Paul E. McKenney wrote: > > > > > On Fri, Oct 24, 2014 at 12:45:40AM +0300, Yanko Kaneti wrote: > > > > > > > > > > > > On Thu, 2014-10-23 at 13:05 -0700, Paul E. McKenney wrote: > > > > > > > On Thu, Oct 23, 2014 at 10:51:59PM +0300, Yanko Kaneti wrote: > > [ . . . ] > > > > > Ok, unless I've messsed up something major, bisecting points to: > > > > > > > > 35ce7f29a44a rcu: Create rcuo kthreads only for onlined CPUs > > > > > > > > Makes any sense ? > > > > > > Good question. ;-) > > > > > > Are any of your online CPUs missing rcuo kthreads? There should be > > > kthreads named rcuos/0, rcuos/1, rcuos/2, and so on for each online CPU. > > > > Its a Phenom II X6. With 3.17 and linux-tip with 35ce7f29a44a reverted, the > > rcuos are 8 > > and the modprobe ppp_generic testcase reliably works, libvirt also manages > > to setup its bridge. > > > > Just with linux-tip , the rcuos are 6 but the failure is as reliable as > > before.
> Thank you, very interesting. Which 6 of the rcuos are present? Well, the rcuos are 0 to 5. Which sounds right for a 6 core CPU like this Phenom II. > > Awating instructions: :) > > Well, I thought I understood the problem until you found that only 6 of > the expected 8 rcuos are present with linux-tip without the revert. ;-) > > I am putting together a patch for the part of the problem that I think > I understand, of course, but it would help a lot to know which two of > the rcuos are missing. ;-) > Ready to test --Yanko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
